Is there a public exploit for CVE-2026-123862?

No public exploit for CVE-2026-123862 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-123862?

CVE-2026-123862 scores CVSS 2.9 (v3.0), rated low.

What does CVE-2026-123862 affect?

CVE-2026-123862 affects nodejs Node.

2.9 Low

An uncatchable exception in the Node.js zlib streaming API lets a peer crash a process by disconnecting while data is being compressed.

CVE-2026-123862

An uncatchable exception in the Node.js zlib streaming API lets a peer crash a process by disconnecting while data is being compressed. zlib.params() queues a flush and completes its work in that write's callback; if the stream is destroyed first, as pipeline() does when the peer goes away, Writable still invokes the callback with an error, but the callback ignores its arguments and asserts that the native handle still exists. The handle is gone, so an ERRINTERNALASSERTION is thrown from inside stream internals and bypasses the stream's error event, the params() callback, and the pipeline() callback, terminating the process. An application is affected only if it calls deflate.params() while streaming to a peer, which is uncommon. This vulnerability affects Node.js 26.x, 24.x, and 22.x.

Assessment

CVSS: 2.9 (v3.0)
Severity: Low
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 11 November 2026
Last updated: 11 November 2026
Affected: nodejs · Node
Assigner: openjs

CVSS vectorCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

At the source

EUVD (ENISA)

References

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